Chapter 4: Appendix E - 20mA Current Loop Option

4-25

Current Loop Cable Wiring

You can wire the ACM/Flex16 with the 20mA Current Loop option in various ways to communicate with 20mA Current Loop peripherals. This section describes an example of a Current Loop cabling scheme.

Figure 22 describes a 4 wire cabling scheme between a port on the ACM/Flex16 and another port on an external device.

Figure 22: Current Loop wiring diagram(4 wire)

External

Current

Source

+-

TxD +

2

 

 

RxD -

TxD -

7

 

 

RxD +

RxD -

1

 

 

TxD +

RxD +

8

 

 

TxD -

ACM/Flex16 Port

+

-

External Device

DB-9 connector

Connector

 

 

External

 

 

 

Current

 

 

 

Source

 

 

Note:

The example above illustrates a 20mA Current Loop cable wiring configuration between one port of the ACM/Flex16 and another port of an external device.

Intellicon-NT960/PCI User's Manual, ver. 0.02